摘要
针对某热电厂汽轮机6号抽汽温度大幅升高的现象,通过对3号低压加热器的危急疏水U形管进行补水处理,6号抽汽温度短期内恢复正常;随后长期运行后再次出现6号抽汽温度大幅上升的问题。基于弗留格尔公式和道尔顿定律,利用汽轮机6号抽汽温度正常与异常时的运行数据,从理论上进行计算与分析,并通过现场密封胶水处理确定了泄漏点位置,得出3号低压加热器的疏水管破裂泄漏造成了6号抽汽温度大幅上升和凝汽器真空度降低。对裂缝进行修补后,汽轮机的6号抽汽温度恢复到正常温度,凝汽器真空度达到运行标准要求,同时也验证了理论分析的正确性。
To avoid the sharp rise of steam temperature at No.6 bleed point of a steam turbine in a thermal power plant,the emergency drainage U-tube of No.3 low-pressure heater was supplemented with make-up water,following which,the steam temperature recovered for a short time.However,the same problem appeared again after a long period of operation.Based on the Flugel formula and Dalton law,normal and abnormal operation data of the steam temperature at No.6 bleed point were calculated and analyzed theoretically,and subsequently the leakage point was located on the drainage pipe of No.3 low-pressure heater with the aid of on-site glue sealing method,which was found to be the main cause leading to the great increase in the steam temperature and a decrease in the condenser vacuum.Above problems were finally solved after the crack was repaired,proving the results of theoretical analysis to be correct.
作者
顾柳栋
胥建群
皇甫泽玉
陈晓欣
张浩峰
张建东
Gu Liudong;Xu Jianqun;Huangfu Zeyu;Chen Xiaoxin;Zhang Haofeng;Zhang Jiandong(Key Laboratory of Energy Thermal Conversion and Control ofMinistry of Education, Southeast University, Nanjing 210096, China;Huaneng Suzhou Thermal Power Co., Ltd., Suzhou 215129, Jiangsu Province, China)
出处
《发电设备》
2020年第1期66-70,共5页
Power Equipment
关键词
凝汽器
真空度
给水加热器
参数分析
condenser
vacuum degree
feed water heater
parametric analysis
